US2235129A - Glassware forming machine - Google Patents

Description

March 18, 1941. Q R, vlNlNG ETAL 2,235,129

GLAsswAHE FORMING MACHINE Filed March 20, 1.939 5 ShQGSF-She' L March 1s, 1941. C. R. WNW@ TAL- 2,235,129

GLAsswARE FORMING MAUHI'NE Filed March 20, 19153 5 Sheets-Sheet 4 Y 'I VAT* BY Maf/7 March 18, 1941.

c. R. vlNlNG Erm.'

GLASSWARE FORMING MACHINE Filed March zo, 1939- 5 sheets-sheet s Ill 'RJQ CR W12/n mw [C Hann/Zan /NVENTOR ORNE KS patented Mar. 18, 1941 GLASSWARE FORMING MACHINE Charles R. Vining, Elmore, and Irvin C. Hamilton,

Toledo, Ohio, assignors to Libbey Glass Company, a corporation of 'Ohio Application March 20,

6 Claims.

rli'he present invention relates -to improvements in glassware forming machines and more especially to apparatus for shaping and alxing the toot or base portions to tumblers and like artiit cles of tableware.

An object of the invention is the provision of automatic means for shaping and simultaneously attaching the foot or base portions to tumblers. To this end the invention is embodied in a conmi tinuously rotating machine which in somewhat less than a single revolution, receives and transforms a measured charge of molten glass into a root or base portion, attaches it to a tumbler m bowl and marvers ithe glass and finally positions M the completed article for removal, the latter being effected manually or mechanically as may be desired.

lt is also an object to provi-de means whereby the machine may with comparative ease be adad justed to operate upon ware of diierent sizes.

Other objects Will be in part apparent and in part pointed out hereinafter.

In the drawings: l

Fig. 1 is a front elevational View of one of the 2d heads of the forming machine;

Fig. 2 is a fragmentary plan view with parts in section illustrating the individual head construction at different elevations;

Fig. 3 is a vertical transverse sectional View 3d through the complete machine;

Fig. 4 is a vertical sectional elevational view taken substantially along the line 4--4 of Fig. 1;

Figs. 5, 6 and 7 are sectional views illustrating the successive steps involved in the foot forming td and attaching operation. Fig. 5 shows the mold charge prior to its being pressed into final shape.

Fig. 6 illustrates the manner in which the pressing heading spaces the mold charge. Fig. 7 shows the complete assembly and the mold parts 4@ removed from contact with the glass.

Fig. 8 is a fragmentary sectional elevational View of the means for adjusting the chuck and operating mechanism therefor vertically to compensate for differences in the length of the glass- 45 ware being fabricated;

Fig. .9 is a detail sectional view of the mechanism for manipulating :the foot pressing head; and

Fig. 10 is a sectional view taken substantially d0 along the line Ill-Ill of Fig. 9.

Our invention is embodied in a rotary type machine which includes a wheeled base I5 of drumlike formation, the vertical outside wall I6 of which supports stationary cams and a ring gear,

55 the functions of which will become apparent here- 1939, Serial No. 262,820

inafter. A stationary central column l1 rises axially from the base and at its upper end carries a spider i8 intended to support another stationary cam, the functions of which will become apparent hereinafter. A rotary carriage 5 I9 is mounted upon the base I5 for rotation upon anti-friction bearings 20, which may well be the conventional ball bearings positioned at the periphery of the base and carriage.

.Continuous rotation of the carriage i9 is obtained by means of an electric motor 2|, which drives the carriage through a speed reduction gearing 22 and pinion 23, the latter running in mesh with a ring gear 24 which forms a part of or is rigidly attached to the under side of said carriage.

The hub portion of the carriage and base are constructed to provide a continuous annular air chamber 25 to which air under pressure is supplied through a pipe 26 and from which air is 20 conducted to the several heads of the machine, for a purpose to be described, by means of pipes 21, which are individual to the heads.

An annular series of foot forming and attaching heads aremounted upon the peripheral portions of the carriage I9 and through rotary movement of the latter. are caused to travel through several zones or positions, wherein the steps, making up a complete cycle of operations, are performed. Inasmuch as all of the heads are 30 identical in construction and operation, the following detailed description will be directed to one head only.

Each head includes a bowl supporting chuck unit 2s and a foot or base forming umn 29, said 3u chuck being adjustable vertically with respect tothe foot forming unit so as to adapt the machine to the manufacture of footed tumblers of different heghts.

The bowl supporting unit includes a vertical bracket 30 carried by a slide 3l which is mounted in opposed vertical guideways 32, the latter being provided at the margins of a carrier 33. This carrier includes an inwardly directed arm 34 at its upper end which takes over and is removably 4" attached to the carriage I9. Adjustment of the slide and parts carried thereby is obtained through the medium of a vertical, threaded adjusting rod 35, which is journalled in bearings 36 and is threaded through a lug 31 carried by the slide 3|. The upper end of the adjusting rod is operatively connected to amanually actua-ted crank 33, or hand wheel, through means including a pair of meshing bevel gears 39. Through this mechanism the bowl supporting unit may be adjusted to compensate for variations in the length of the tumblers being fabricated.

'I'he chuck 40 for supporting Ithe bowls B, includes a pair of jaws 4I which are mounted upon a horizontal hinge pin 42 at the upper end of a push rod 43 and also are connected through links 44 to the upper end of a tubular drive shaft 45. This drive shaft encloses a major portion of the push rod 43 and forms a guide therefor. Furthermore the tubular shaft 45 is reduced in diameter in proximity to its upper end, the reduced portion being journaled in a bearing 46 provided at the upper end of the bracket 80. That portion of the tubular shaft 45 which is disposed below the bearing 46 and above the lower end of the bracket 30, is provided externally with gear teeth extending from'end to end and running in mesh with a pinion 41, which in turn meshes with an annular ring gear 48, the latter being carried by the base I5. Movement of the head .circumferentially of the base very obviously results in rotation ofthe chuck 40 and the bowl B supported therein.

Opening and closing o f the chuck jaws 4I is effected by vertical movement of the push. rod 43, such movement being obtained automatically at regular time intervals by mechanism including a pneumatically actuated tappet unit 49. This l unit consists of a cylinder 50 and a piston 5I mounted therein, said piston carrying a rod 52 which is continuously engaged with an adjustable extension 53 on the bottom end of the push rod 43. A sleeve 54 interposed between the extension 59 and a coil spring 55, which encircles the push rod between the aforementioned tubular shaft 45 and the guide 56 at the lower end of the bracket 99, functions as a part of the mechani'sm providing operative connection between the tappet and push rod. As is obvious, the connection is yieldable and to a greater or lesser degree precludes the possibility of exerting excessive pressure upon that portion of the bowl which is gripped by the chuck jaws 4|. Actuation of the tappet 4S is obtained by the application of air under pressure flowing to the bottom end of the cylinder 50 by way of the aforementioned pipe 21 and a cam actuated valve 51. This valve includes a plunger :type control 58 which at regulartime intervals is brought into engagement with a stationary cam 59, l the latter being mounted upon the base I5.

The footforming unit includes a pair of mold sections 60 which are separably attached to holders 6I, the latter being mounted upon radial arms 62 which are carried by a pair of slides 63. The se slides which are placed on edge and mounted for horizontal movement relative to each other, are supported in vertically spaced slideways 64 or guides, which extend tangentially relative to the periphery of the carriage I9. Brackets 65 rigidly support the guides upon the carriage. A coil spring 66 connects the two slides 63 and continuously exerts a pressure tending to bring the mold sections 68 into engagement with each other. A spreader or mold opener 61 is positioned between the inner ends of the slides for the purpose ofA separating the mold sections 60 at regular time intervals. The spreader is mounted upon a short shaft 68 which extends radially inward therefrom and carries a bell crank lever 69. The free end of the bell crank lever carries a roller which runs in a continuous box cam 1I, the contour of which predetermines the points at lwhich the foot forming molds open and close.

The mold sections 68 are provided centrally with a vertical opening 12, the dimensions and shape of which correspond to those of the base of the bowl B and short neck portion which connects the-bowl and foot proper. The upper end of this opening 12 merges into a shallow cavity 13 which corresponds in shape and dimensions to those of the upper surface of the foot F. The mold is completed by means of a pressing head 14 which includes a holder 15 and a block 16,l

mounted upon the upper end of a rod 19 whichl is partly enclosed in a tubular housing 80, the latter being bolted to the carriage. The lower end portion of this rod 19 extends into a sleeve 8|, said sleeve having a circumferential slot 82 which registers with an elongated slot 89 formed in and extending lengthwise of the housing 80. These slots register with each other and accommodate rollers 84 which are suitably mounted upon the lower portion of the rod 19. An inwardly directed arm 85 at the lower end of the sleeve 8| carries a cam roll 86, which at regular time-intervals, is engaged by a stationary cam 81, the latter operating to move the sleeve 8I land rod 19 downwardly. Such downward movement of these parts relative to the housing 80, together with rotary movement of the rod 19, due to the outer roller 84 following the path of the curved slot 63- in the housing, brings the pressing head 14 into axial alignment with the closed mold sections 69. A key 88 (Fig. 9) carried by the housing 88 and running in a keyway 89 in the sleeve 8I, holds the latter against rotation relative to the housing during axial movement thereof. `A coil spring 99 positioned within a sleeve 9| at the upper end of the housing normally tends to hold the arm 11 in its uppermost position. It will be observed that this sleeve 9| is threaded upon the upper portion of the rod 19 and that the spring 96 is held between the upper end of the sleeve 9I and a washer 92v which is supported by screws 93 or the like, extending into the housing.

Adjustment of the arm 11 upon the rod 19 .may be obtained by rotation of a knurled adjusting nut 94 as is obvious.

Operation of the machine involves continuous rotation of the carriage I9 so that the forming heads are moved in succession past several stations. At one station, or position, a tumbler bowl B is placed in an inverted position. between the jaws of the bowl supporting unit 40. Immediately the jaws 4I are closed about the constricted neck portion. In a succeeding zone the foot mold sections 60 are brought together substantially as shown in Fig. and thereafter a measured charge C of molten glass is deposited centrallyof the mold cavity in contact with the closed end of the bowl. In the next position lthe pressing head is swung radially outward and lowered to complete the mold cavity and simultaneously press the molten glass to its final shape and eifect permanent attachment thereof to the bowl. During these operations the chuck rotates about its axis continuously so that the glass iii lid

nasale loi-ming the foot is ironcd or inarvered. utter the class has set suiliciently, the pression' head is elevated and moved radially lnvvard ci the machine and the loot mold sections du are separated, leaving the bowl and attached completed foot supported in the chuclr llt. Following this operation the chuck is opened and the article removed therefrom manually, or bv a mechacal device, many of which are available lor this purpose.

Modifications may he resorted to vvlthln the spirit and scope oi the appended claims.

lille claim:

l. Glassware termino apparatus compris-ina a bowl supportinc chuck, a Jhuit ilorminu and attaching unit positioned above the chuclt, said unit including horizontally separable mold sections, a pressing head arranged for cooperation with said mold sections, means ior eiibctinp synchroniaed operation of the chuclt, mold sections and head, means for effecting relative rotation oi the chuck and said unit, a slide supporting the chuclr and manually operable means tor adjusting the slide vertically relative to said unit.

2. Glassware forming apparatus comprising a bowl supporting chuck, said chuck consisting ot a pair oi separable jaws, means normally yieldinply holding the jaws closed, pneumatic means for separating the jaws, means lor' imparting' rotary movement to the chuck about its longitudinal axis and a foot forming and attaching unit positioned above and individual to the chuck, said unit includingV a pair of mold sections, a pressing head normally disposed above said sections and automatic means i'or operatively posi-rl tioning said head relative to the mold sections at regular time intervals.

3. Glassware forming apparatus comprising a bowl supporting chuck, said chuck consisting of a pair of separable jaws, means normally yieldincly holding the jaws closed, pneumatic means :lor separating the jaws, means for imparting rotary movement to the chuck about its longitudinal axis, a foot forming and attaching unit positioned above anclindividual to the chuck, said unit including a pair of mold sections, a pressing head normally disposed above said sections, automatic means for operatively positioning said head relative to the mold sections at regular time intervals, horizontally movable supports for the mold sections, spring means normally holding the sections closed, and automatic means for separating the supports and mold sections at times.

i. @locaware termino apparatus comprising a bowl supportinu cliuclt, said chuclt consistido ol' a pair ol separable jaws, means normally yieldinnly holdinp the iavvs closed, pneatic means lor separatista the glaive, means lor imparting rotary movement to the chucli; about its longitudinal airis, a loot lorminc and attachinc unit positioned above and individual to the clinch, said unit lncludinp a pair ol mold sections, a pressing head normally disposed above said sections, automatic means lor operatively posltioninc said head relative to the mold sections at regular time intervals, horicontally movable supports lor the mold sections, sprina means normally holdinc the sections closed, and cam controlled means lor scparatinar the supports and mold sections at reciclar time intervals.

li. lllasslvare forming apparatus comprislrip,r an annular series oi heads mounted lor rotation about a vertical aids, means tor impartida continuous rotary movement to the heads, each head lncludina a vertically disposed bovrl supper-tina chuck, means lor rotation the chuclr aboutits vertical lona'itudinal airis, a toot termine and attachina t positioned above the chucir, said unit including a pair ci mold sections separable aloha a line entendina tana'entially oi the path oi travel ol the heads, a pressing head positioned above the mold'sections and adapted tor cooperation therewith in pressinc and nnaliy shaping a foot portion and automatic means actuated by rotation ci the heads i'or eil'ecting synchronized operation ci the chucir, mold sections and pressing heads.

6. Glassware termina apparatus comprising a veijzicallyi, disposed bowl supporting chuck, means for rotating the chuci: about im vertical longitudinal axis with a bowl support therein in an inverted position, a foot formino and attaching unit spaced above said chuck, said unit including a, pair of horizontally separable sections having a central opening and a cavity provided in its upper side and merging into said central opening, a pressing head disposed above the mold sections, and means for bringing the pressing head into position for cooperation with the mold sections in pressing a foot and attaching it to the bowl, sald'last named means including a stationary cam and a yielding support for the head adapted to be actuated by said cam. l

CHARLES R. VINING. IRVIN C. HAMLTON.

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